早熟型小麦种质系山农0057的细胞学鉴定  

Breeding of Wheat-Thinopyrum intermedium Alien Substitution Line Shannong 0057 and Its Cytological Identification

作　　者：王黎明[1] 李萍[1] 王合坚 王洪刚[3] 

机构地区：[1]河南科技大学农学院,河南洛阳471003 [2]日照市岚山区虎山镇农机站,山东日照276800 [3]山东农业大学农学院

出　　处：《河南农业科学》2007年第10期27-29,32,共4页Journal of Henan Agricultural Sciences

基　　金：国家自然科学基金资助项目(30571156);河南科技大学大学生研究训练计划(SRTP)项目(2006060)

摘　　要：中间偃麦草含有丰富的优良基因,在小麦的遗传改良中具有重要利用价值。对从中间偃麦草与小麦品种烟农15杂种后代(BC3F6)中选育的小麦种质系山农0057进行主要农艺性状调查和细胞学鉴定,结果表明:山农0057平均株高61cm,平均穗长6.7cm,挑旗期、抽穗期分别比亲本烟农15早4d,是一个具有早熟特点的种质系;其根尖细胞染色体数目为2n=42,花粉母细胞减数分裂中期Ⅰ(PMCMⅠ)染色体构型为2n=21Ⅱ;与普通小麦的杂种F1PMCMⅠ染色体构型为2n=20Ⅱ+2Ⅰ。山农0057可能是一个具有早熟特点的小麦-中间偃麦草的二体异代换系。Thinopyrum intermedium carries aboundant valuable genes which is beneficial for wheat genetic improvement. A novel wheat germplasm, Shannong 0057,derived from the progeny （BC3F6） of Thinopyrum intermedium and wheat cuhivar（Yannong 15）, was identified using morphological and cytological analysis. The results showed that Shannong 0057 had a plant height of 61 cm, spike length of 6.7cm, 4 days earlier than its parent Yannong 15 in flag leaf date and heading date. The chromosome number of Shannong 0057 in root tip cell was 2n=42 and its chromosome configuration at PMC MI was 2n= 21 Ⅱ. Its chromosome configuration of hybrids F1 at PMC MI was 2n=20 Ⅱ ＋2 Ⅰ ,indicating that Shannong 0057 was probably a wheat-Thinopyrum intermedium alien disomic substitution line.

关 键 词：小麦 中间偃麦草 异代换系 山农0057 细胞学 

分 类 号：S512.1[农业科学—作物学]